Hydrocarbon-lamp.



Uivrrr; STATE-s I' JOHN BYSTROM, OF

AfrnNfr OFFICE.

CHICAGO, ILLINOIS.

HYDRocARBoN-LAMP.

SPECIFICATION forming part of Letters Patent No. 703,384, datedJuly 1, 1902. Application filed April 5, 1901. Serial No. 54,550. (No model.)

To @ZZ whom, t may concern;

Be it known that I, JOHN BYs'rRoM, a citizen of the United States, residing at Chicago, in the county of Cook andrState of Illinois, have invented certain new and useful Improvements in IIydrocarbon-Lamps, of which the following is a specification.

The object of this invention is to simplify and improve the construction and operation of hydrocarbon-lamps.

In the accompanying drawings, Figure l isV a side elevation of a lamp-body having in its construction the features of myvinvention, the shell or casing for said lamp-body being represented in section. Fig. 2 Yis a vertical central section through the lamp-body. Fig. 3 is a top plan view ofthe same, the screens in the mixing-chamber having been removed. Fig. 4 is a transverse section on dotted line t 4 of Fig. 1. Fig. 5 is an enlarged sectional view of the needle-valve. Fig. 6 is an enlarged front end view of the needle-stem, intended to show the flattened side of the stem and of the needle-point.

Like letters of reference indicate correspondin g parts throughout the several views.

In the production of this lamp I provide a body portion A, comprising a central mixingtube A', having at its upper end the enlarged mixing-chamber A1. This mixing-chamber has the inner annular shoulder A3 about midway of its height, the upper end of said chamber being open; Within the bottom of said mixing-chamber is a semicircular row of holes A1 to provide subjets for assisting in heating the body portion of the lamp. On one side of the mixing-tube A', I provide an integraly riser-tube A5, having the internally-screwthreaded socket AG for the reception of the valve-pipe, to be later herein described. On the opposite side of the mixing-tube A' is thev integral gas-tube A1, extending parallel ywith said mixing-tube and projecting to a point beyond the lower end of said tube. At its lower end the gas-tube A7 has a transverse extension A8, and said transverse extension has a longitudinal tube A9 alined with said mixing-tube A' and having asmall opening A10 for-the point of the needle-valve, to be later described herein. The tube A9 is provided with the internal screw-threads A11 for receiving the externally-screw-threaded nee tween the upper end of thevriser-tube A5 andv that of the tube A1. Thisfrib is integral with the body-casting A, and -its middle portion.

is formed with a hollow boss A14, internally screw-threaded to receive the screw-threaded plug A15 to close the outer end of the opening in said boss. The lower end of the risertube, the lower end of the gas-tube A1, and the outer end of the transverse extension AB are closed by the screw-threaded plugs A16. The upper ends of the tubes A5 and A7 are connected by the'ducts A11 and A18, formed by drilling from the interior of the hollow boss A11.

B is a tubular shell cut awayinthe elongated opening B' to receivethe socket Ai and tolpermit said shell to be placed over the lamp-body, alsoprovidedwith an opening B2, adaptedto coincide with the hollow screwthreaded stud A12. v

B3 is a screw adapted to pass through the opening B2 in the shell B and enter the hollow stud A12, its purpose being to secure the tubular shell in position upon the body portion of the lamp.

C is a supply-valve for regulating the flow Vof hydrocarbon to the lamp-body. The end of the pipe C of the valve is externally screwthreaded to enter the socket AG.

D is the needle-valve stem externally screwkthreaded to correspond with the interior of the tube A9. vThe upper end of this stem carries the needle-point D', (formed from a piece of wire secured in the end of the valvestem,) which needle-point andthe upper end of the stem are liled away on one side, and thus attened to permit the escape ot' a small quantity of gas when the valve is nominally closed and to permit the burning. of `a small flame. The flattening of the needle-point also causes the needle to act like a reamer, scraping out the escape-opening A10 and keeping said opening free from soot and dirt.

D2 is a generating-cup having the central IOO hub Ds internally screw-threaded to correspend with the screw-threads upon the needle-valve stem. The hub D3 is also provided with a larger central opening D4, extending part way through the hub and internally screw-threaded to correspond with the external threads upon the vertical tube A1.

E is a screen, formed from wire-netting in disk form, adapted to fit within the mixingchamber A2 and rest upon the annular shoulder A3 therein. E is also a wire screeinformed in cap shape, adapted to be inserted within the upper end of the mixing-chamber.

In operation gasolene is conducted to the body portion A by means of a pipe F, leading to the supply-valve C. The hydrocarbon or the gas generated therefrom passes through the socket A6, through the risertube A5, into the ducts A17 and A18, passing intermediately through the hollow boss A14, downward through the tube A1, outward through the transverse extension A, and upward through the needle-orifice A10 into the mixing-tube A. In the mixing-tube it is combined with air and is carried upward into the mixing-chamber A-`,where after passing through the screen E and the screen E it enters the mantle (not shown) and is consumed upon the exterior surface of said mantle. A quantity of the gas is projected downward through the openings A1 in the bottom of the mixing-chamber A2, where it burns, constituting subjets, the purpose of which is to heat the body portion A. The wire screens E and E are intended to insure a thorough mixing of the gas.

The form of the needle-valve permits a minute but constant stream of gas to flow through the discharge-opening A10, and thus a small flame burns at all times at this point, even when the needle-valve is closed tightly. The form ofthe needle D and of the point of the valve-stem D prevents -a clogging in the discharge-opening A10, said needle acting as a reamer to keep the opening free from dirt and foreign substances.

While I have referred to the branches of the body portion as being tubular, they are so in fact only after holes are drilled in the cylindrical portions hereinbefore called tubes, the outer ends of the holes formed by the drill being closed by the plugs A16. The ducts A17 and A18 are drilled from the bottom of the hollow boss A14, both ducts being closed by the screw-plu g A15.

I claim as my inventionl. A needle-valve for hydrocarbon-lamps, having a valve-stem and a needle-point, said needle-point consisting of a Wire fixed centrally of said valve-stem and at the forward end thereof, one-half of said point being cut away along its axial diameter, and said valvestem being flattened at its end to coincide With the at side of the needle-point, in order to permit the escape of a small quantity of gas when the needle-valve is nominally closed.

2. The combination with a valve-casing having a tube with a stop-shoulder in said tube and a discharge-orifice, of a valve-stem adapted to lie within said tube and having a shoulder adapted to engage the stop-shoulder, said valve-stem having a needle-point adapted to enter said orice, which needle-point consists of a wire fixed centrally of said valvestem at the `forwardend thereof, and being cut away at one side, said valve-stem also being iiattened at its end to permit the escape of a small quantity of gas when the shoulder of the valve-stem is in contact with the stopshoulder of the tube.

JOHN BYSTROM.

Witnesses:

LUTHER L. MILLER, OLIVER S. BROWN. 

